package com.huisang.servlet.user;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.huisang.pojo.User;
import com.huisang.service.user.UserService;
import com.huisang.service.user.UserServiceImpl;
import com.huisang.util.Constants;

public class LoginServlet extends HttpServlet {

    //控制层，调用业务层代码

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        
        //获取用户名和密码
        String userCode=req.getParameter("userCode");
        String userPassword=req.getParameter("userPassword");

        //和数据库中的密码进行对比；进行调用业务层
        UserService userService=new UserServiceImpl();
        User user=userService.login(userCode,userPassword);//这里已经把登录的人查出来了
        if(user!=null){//查到人了可以登录
            //将用户的信息放到Session中
            req.getSession().setAttribute(Constants.USER_SESSION, user);
            //跳转到内部主页
            resp.sendRedirect("jsp/frame.jsp");
        }else{//没有查到无法登录
            //转发回登录界面,提示用户名或密码错误
            req.setAttribute("error", "用户名或者密码不正确");
            req.getRequestDispatcher("login.jsp").forward(req, resp);
        }
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}
